Answer:
B. 6.31 × 10^–9
Explanation:
I got it correct in my test
The hydronium ion concentration is 6.31 x 10⁻⁹ mole/dm³.
The hydronium ion is equivalent to H₃O⁺ and its concentration is equivalent to the H⁺ ion concentration. The H⁺ ion concentration is given by:
pH = -log[H⁺]
Given; pH of 8.2
So,
[H⁺] = 10^(-8.2)
[H⁺] = 6.31 x 10⁻⁹ mole/dm³
Hence The hydronium ion concentration is 6.31 x 10⁻⁹ mole/dm³.
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